
DTN reports that Western Midwest and Plains growing degree day totals through May 20 run near average to about 100 units below normal, while the eastern Midwest is more than 100 units above. A wet pattern is the main crop-weather concern.
Slow heat accumulation delays crop development in the western Corn Belt, a modest yield risk that can add a small weather premium to corn and soybeans.
After 1,465 past bullish weather events, Corn moved a median +0.2% over 5 sessions (54% higher; middle half -1.4% to +1.9%), and +0.9% over 20.
After 1,079 past bullish weather events, Soybeans moved a median +0.3% over 5 sessions (54% higher; middle half -1.4% to +2.0%), and +0.9% over 20.
Moves of each commodity's benchmark from the last close before the event. Historical reads pool past events of the same kind; they describe what happened, not what will. Not investment advice.